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Thread: E38 Complete audio upgrade

  1. #1
    Join Date
    Feb 2024
    Location
    Colorado
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    My Cars
    2000 bmw 740il

    E38 Complete audio upgrade

    Hi, first time on any forum. I want to upgrade my entire sound system. In order to do this do I just simply unplug and remove everything in the trunk and then run all new wiring from my new head unit? Sorry if this is a dumb question but I don't fully understand how all of the sound system electonics function with the rest of the car.

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,934
    My Cars
    2018 BMW M240i
    It’s never as simple as plug and play in a bimmer. Here are the wiring diagrams: https://bmwteka.com/wds/en/e38old

  3. #3
    Join Date
    Feb 2024
    Location
    Colorado
    Posts
    2
    My Cars
    2000 bmw 740il
    Thank you for the wiring diagrams, but can I not just bypass all of the original system?

  4. #4
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,934
    My Cars
    2018 BMW M240i
    That would require ripping out a lot modules and wiring. The audio system, even in that chassis, was fairly integrated.

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